R help - Nov 2010 - how to view the top 20 lines in a long dataset

Hi,
I am simply looking for the function that will allow you to look at the top
20 lines of a long dataset?

LP


On Mon, Nov 1, 2010 at 10:46 AM, Louis Plough <lplough@usc.edu> wrote:
> Hi,
> I am trying to generate all possible permutations (choose 2) of a vector,
> b, for example--using 'combn' the combinations in only one
direction are
> generated...
>
> > b<-c(.1,.2,.3)
> > combn(b,2)
>      [,1] [,2] [,3]
> [1,]  0.1  0.1  0.2
> [2,]  0.2  0.3  0.3
>
>                         [1,] 0.1  0.2  0.3  0.2  0.3  0.3        These
> should also be there.
>                         [2,] 0.1  0.2  0.3  0.1  0.1  0.2
>
> Is there another R function that can do this??
>
> Thanks,
> Louis
>
	[[alternative HTML version deleted]]

?head or just

df[1:20, ]

Louis Plough wrote:
> Hi,
> I am simply looking for the function that will allow you to look at the top
> 20 lines of a long dataset?
> 
> LP
> 
> 
> On Mon, Nov 1, 2010 at 10:46 AM, Louis Plough <lplough at usc.edu>
wrote:
> 
>> Hi,
>> I am trying to generate all possible permutations (choose 2) of a
vector,
>> b, for example--using 'combn' the combinations in only one
direction are
>> generated...
>>
>>> b<-c(.1,.2,.3)
>>> combn(b,2)
>>      [,1] [,2] [,3]
>> [1,]  0.1  0.1  0.2
>> [2,]  0.2  0.3  0.3
>>
>>                         [1,] 0.1  0.2  0.3  0.2  0.3  0.3        These
>> should also be there.
>>                         [2,] 0.1  0.2  0.3  0.1  0.1  0.2
>>
>> Is there another R function that can do this??
>>
>> Thanks,
>> Louis
>>
> 
> 	[[alternative HTML version deleted]]
> 
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.

See ?head
Regards
S?ren

________________________________________
Fra: r-help-bounces at r-project.org [r-help-bounces at r-project.org]
På vegne af Louis Plough [lplough at usc.edu]
Sendt: 1. november 2010 20:40
Til: r-help at r-project.org
Emne: [R]  how to view the top 20 lines in a long dataset

Hi,
I am simply looking for the function that will allow you to look at the top
20 lines of a long dataset?

LP


On Mon, Nov 1, 2010 at 10:46 AM, Louis Plough <lplough at usc.edu> wrote:
> Hi,
> I am trying to generate all possible permutations (choose 2) of a vector,
> b, for example--using 'combn' the combinations in only one
direction are
> generated...
>
> > b<-c(.1,.2,.3)
> > combn(b,2)
>      [,1] [,2] [,3]
> [1,]  0.1  0.1  0.2
> [2,]  0.2  0.3  0.3
>
>                         [1,] 0.1  0.2  0.3  0.2  0.3  0.3        These
> should also be there.
>                         [2,] 0.1  0.2  0.3  0.1  0.1  0.2
>
> Is there another R function that can do this??
>
> Thanks,
> Louis
>
        [[alternative HTML version deleted]]

______________________________________________
R-help at r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.

is this what you want?

head(yourdataset,20)
?
Felipe D. Carrillo
Supervisory Fishery Biologist
Department of the Interior
US Fish & Wildlife Service
California, USA



----- Original Message ----
> From: Louis Plough <lplough at usc.edu>
> To: r-help at r-project.org
> Sent: Mon, November 1, 2010 12:40:19 PM
> Subject: [R] how to view the top 20 lines in a long dataset
> 
> Hi,
> I am simply looking for the function that will allow you to look at the top
> 20 lines of a long dataset?
> 
> LP
> 
> 
> On Mon, Nov 1, 2010 at 10:46 AM, Louis Plough <lplough at usc.edu>
wrote:
> 
> > Hi,
> > I am trying to generate all possible permutations (choose 2) of a
vector,
> > b, for example--using 'combn' the combinations in only one
direction are
> > generated...
> >
> > > b<-c(.1,.2,.3)
> > > combn(b,2)
> >? ? ? [,1] [,2] [,3]
> > [1,]? 0.1? 0.1? 0.2
> > [2,]? 0.2? 0.3? 0.3
> >
> >? ? ? ? ? ? ? ? ? ? ? ? [1,] 0.1? 0.2? 0.3? 0.2? 0.3? 0.3? ? ? ? These
> > should also be there.
> >? ? ? ? ? ? ? ? ? ? ? ? [2,] 0.1? 0.2? 0.3? 0.1? 0.1? 0.2
> >
> > Is there another R function that can do this??
> >
> > Thanks,
> > Louis
> >
> 
> ??? [[alternative HTML version deleted]]
> 
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>

On Mon, Nov 1, 2010 at 3:40 PM, Louis Plough <lplough at usc.edu>
wrote:
> Hi,
> I am simply looking for the function that will allow you to look at the top
> 20 lines of a long dataset?
>
> LP
Try this:

head(iris)
head(iris, 20)
View(iris)


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